ccbb5e84f9
Docs are here: http://tannewt-micropython.readthedocs.io/en/microcontroller/ It differs from upstream's machine in the following ways: * Python API is identical across ports due to code structure. (Lives in shared-bindings) * Focuses on abstracting common functionality (AnalogIn) and not representing structure (ADC). * Documentation lives with code making it easy to ensure they match. * Pin is split into references (board.D13 and microcontroller.pin.PA17) and functionality (DigitalInOut). * All nativeio classes claim underlying hardware resources when inited on construction, support Context Managers (aka with statements) and have deinit methods which release the claimed hardware. * All constructors take pin references rather than peripheral ids. Its up to the implementation to find hardware or throw and exception.
91 lines
3.0 KiB
C
91 lines
3.0 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Scott Shawcroft
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "esp8266/ets_alt_task.h"
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#include "esp8266/hspi.h"
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#include "shared-bindings/nativeio/SPI.h"
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#include "py/nlr.h"
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#include "eagle_soc.h"
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extern const mcu_pin_obj_t pin_MTMS;
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extern const mcu_pin_obj_t pin_MTCK;
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extern const mcu_pin_obj_t pin_MTDI;
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void common_hal_nativeio_spi_construct(nativeio_spi_obj_t *self,
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const mcu_pin_obj_t * clock, const mcu_pin_obj_t * mosi,
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const mcu_pin_obj_t * miso, uint32_t baudrate) {
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if (clock != &pin_MTMS || mosi != &pin_MTCK || miso != &pin_MTDI) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError,
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"Pins not valid for SPI"));
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}
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}
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void common_hal_nativeio_spi_deinit(nativeio_spi_obj_t *self) {
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, 0);
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, 0);
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, 0);
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}
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bool common_hal_nativeio_spi_write(nativeio_spi_obj_t *self,
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const uint8_t * data, size_t len) {
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size_t chunk_size = 1024;
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size_t count = len / chunk_size;
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size_t i = 0;
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for (size_t j = 0; j < count; ++j) {
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for (size_t k = 0; k < chunk_size; ++k) {
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spi_tx8fast(HSPI, data[i]);
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++i;
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}
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ets_loop_iter();
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}
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while (i < len) {
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spi_tx8fast(HSPI, data[i]);
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++i;
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}
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return true;
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}
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bool common_hal_nativeio_spi_read(nativeio_spi_obj_t *self,
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uint8_t * data, size_t len) {
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// Process data in chunks, let the pending tasks run in between
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size_t chunk_size = 1024; // TODO this should depend on baudrate
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size_t count = len / chunk_size;
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size_t i = 0;
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for (size_t j = 0; j < count; ++j) {
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for (size_t k = 0; k < chunk_size; ++k) {
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data[i] = spi_rx8(HSPI);
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++i;
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}
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ets_loop_iter();
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}
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while (i < len) {
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data[i] = spi_rx8(HSPI);
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++i;
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}
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return true;
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}
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